Printing-machine.



C. A. BLODGETT.

PRINTING MACHINE.

APPLICATION HLBD SBPT.8.1911.

1,031,906. Patented July 9, 1912.

2 SHEBTS-SHBETl Attorneys G. A. BLODGETT.

PRINTING MACHINE.

APPLICATION 111,311 s111218, 1911.

`Patental July 9, 1912.

2 SHEETS-SHEET 2.

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Witnesses Inventor Attorneysmuren CHESTER A. BLDGETT, (33.? EIGKSVILLE, GHR), ASSGNOR 0F ONEALF T0 FRANCS W'.y l

JEFFRIESI. 0F HICKSVLLE, DHH).

remains-Marsman.

Losanna.

To (ZZZ whom t may concern:

Be it known that l, CHESTER A. BLonGn'r'r, a citizen of the United States, residing at Hicksville, in the county of Defiance and State of Ohio, have invented a new and useful Printing-Machine, of which the following is a specicat-ion.

This invention relates to machines for developing photographic prints.

011e of the objects of this invention is to provide a machine 'of this character wherein the printing lights are controlled by the printing frame to be automatically turned on when the negative and sensitized paper have been secured under the back of the printing traine and to extinguish same upon the back being released to remove the eX- posed paper. A

Another object is to provide means for adjusting the printing lights of the machine to increase or decrease the intensity of the rays of light at the various portions of the printing frame.

Further objects are to provide for a novel back or` top for the'printing frame and for a novel resiliently supported or cushioned printing frame, together with otherobjects which will be evident from the following description.

With the above objects in view, this invention resides in the novel construction, ar-

rangement a'nd combination of parts as.

hereinafter described and as pointed out in the appended claims, the invention being illustrated 4in the accompanying drawings, in which similar reference' characters indicate similar parts, and in which-- Figure 1 is a Aperspective view of vthe printing machine. Fig. 2 is a vertical sec` tion thereof, parts being broken away. Fig.

3 is a sectional View in detail, showing thel switch for opening and closing the printing lamp circuit. Fig. 4 is a horizontal section. Fig. 5 is another vertical section, parts being broken away. 1

Referring specifically to the drawiiigs,

there are designated at 7 a suitable casing,

tie front side of which is inclined at a suitable angle for the purpose hereinafter described, and at 6, supporting legs for the said casing. rlhe top of the said casing is designated at 9 and has a central rectangula'r opening 18 therein. A frame 17 is secured on the top 9 around the opening 18, the samebeing spaced from the edge of the Specification of i Letters Patent.

top around the opening to form a seat within same. A printing trame 10 having the pane of glass 11 set inra rabbet in the upper side thereof, 'fits' wit-hin the frame 17 on the top 9 and a plurality of coil springs 20 are disposed between the printing trame 10 and thevtop 9 which serve to resiliently support or cushion the printing frame. A back or cover for the printing traine is hinged at its rear end to the frame 17 and comprises two sections or leaves 12 and 13. These sections are secured together by ,a suitable spring hinge. 37 which .normally tends to swing the forward section 13 upward and backward. A handle 14 is secured to the forward section or'leaf 13 over the outer face thereof and the rear end thereof is beveled as designated at 38. On the section 13 being swung upwardly and rearwardly by the spring hinge 37 the beveled end 38 of the lever 14 strikes the rear section y12 to prevent the forward section from being swung backward too far. A pane of glass 19 is setin a rabbet around the opening 18, the said pane of glass'being frosted 'to diiuse the rays of light passing therethrough. v

On theinner face of each side or' the casing 7 is secured a cleat 27 and on the-rear end of the said cleat is slidably mounted a cross bar 26. On the4 front side of the said cross bar is secured a number of electric lamps 25 for emitting a white light and on one end thereof` is secuged an electric lamp 24 for emitting a red light. A rod 8 is secured to ,each end of the bar 26 and passes through the front of the casing'. A white lamp 25 is also secured to each side of the casing at the front end thereof.

A11 electric switch 28 is pivoted at 30 in the front end of the top 9 within the trame 17, the same being of arcuate form with the convex side thereof projecting above the surface of the top. That port-ion of the switch adjacent the pivotal point is bent downwardly and aleaf spring 31 secured rigidly to the top 9 bears at its free end against the said bent portion 29 of theswitch to give an Iupward tension thereto, thus yieldingly supporting the saidl switch. A

vstop 35 is provided for the switch 28 to prevent the 'excessive upward movement Ithereof. Below the free end oftheswitch 28 and normally spaced therefrom secured acotact 33. The spring- 31 iscfmlatented July 9, 1912. Application led September 8, 1911. Serial No. 648,270. i

eoA

nected with a conducting wire 32 and the Contact 33 is connected to a cmiducting` wire 34. The white lamps are connected in parallel to the wires 4-2 and 34. The wires 4t2 and 32 are passed out of the easing in forni of the usual cord 23 having the plug on the outer end thereof. This plug is adapted to be inserted into the usual socket to connect the wires 112 and 32 with a suitable source of electric current. The switch 28 being normally open, opens the circuit through the white lamps. The red lamp Q11;

is bridged across the wires and 4i). and therefore remains lighted continuously during the use of the machine. Upon the switch 28 being depressed, the circuit through the white lamps is closed.

Openings 21 are provided in the sides of the casing and ov r the said openings are secured hoods 22 which have the rear ends thereof projecting beyond the said openings and open, thus shutting out the light from without the casing and permitting` the cir culation of air through the casing. An upstandi'ng arm 3G is secured to the rear of the top 9 against which the back or top oi the printing frame is adapted to be swung upon the hinges 39 connecting the said back with the frame 17. A pair oit'catches 16 is also provided at the sides of the frame 17 for engaging the printing frame 10 when the same is depressed to retain same in depressed position when so desired.

` In operating the machine, the negative is first placed on the printing trame and the sensitized paper is then placed over the negative in the customary manner, and the leaf l2 ont the top or back is swung over a portion of the sensitized paper and negative to retain same in position on the printing frame, thus allowing a portion of the negative and paper to extend from under same to allow the operator to make final adjust-- nient, andthe leaf 13 is then swung downward by means of the lever or handle 14 whereupon the printing frame is depressed thus causing the switch 28 to be swung downward to engage the contact 33 to close the circuit through the white lamps. Thus at the same moment that the leaf 13 of the top is clamped over the paper and negative, the whitelamps are turned on to expose the sensitized paper to the effect of the-rays of light emitted therefrom. Then after the usual number ot seconds is counted, the lever 11i is released which permits the :front leaf lf3 oi the top to swing upward and the tension on the printing trame being` relieved causes the same to spring upward thus opening the switch which extinguishes the lamps at the same moment that the pre. sure is relieved. This permits rthe sensi tizcd paper to be exposed the required num- .ber oit seconds with great accuracy and also automaticallyr turns on and extinguir;'ies'the ips-ieee printing lamps. ll'lnn desired. the bar Qt which carries the whit(- lamps 25 and the red or ruby lamp 2&1,- ran be slid on the cleats 2i' 'forwardly or rearu'ai'dliY by means ot the rods i" to shitt'I the priv ting lamps with respect to the printinof trame, thus causing the rays o't` light to striliiy the printing trame at various positions t'i-r the purpose of increasing` or decreasing the intein sity ol'l light at the various portions ol" the Virinting Erame. this being required in cir-es where it is desired to gire a portion o'i' thi` sensitized paper a greater exposure to light. than other portions thcreo'l". Ythe iti-ont itt oit the easingl beingy inclined sri-ves as a reflector to retleet the rays o t' light retlecting same upwardly against the printing frame, as will be understood. 'ifhc terr-r l thaving the. rear beveled end 3S which adapted to strike the rear section or leal? l2 ot' the top of the printing frame serves as a means ttor holdingl the said section dmrnward against the 'printing trame to hold the paper and negative thereinul'uler whereby the projecting portion oit the said paper can be. bent or turned upward to b@ observed by the operator, which is essential in some methods otl printing. Then after the sensitized paper has been duly exposed the top ot the printing vtrame is swung backward against the arm 3G and the paper removed, leaving the machine ready for a new operation. lt will also be noted that. the printing` trame is resiliently supported or cushioned on the top of the casing by a plurality ot coiled springs thereiuunder which give an even upward tension to the printing Jframe 'to form an even contactbetween the negative and sensitized paper over the entire surface thereof between the pane 1l and the bach ot' the printing` frame. lt is also understood that the back of the printing frame may be provided with suitable padding 41, such as is in common use, to assure perfect contact between the paper and the negative.

l/Vith this machine the developing of photog 'aphic prints is made very convenient and rapid, and it is also possible to give the sensitized paper the proper number of seconds exposure, which is quite essential to the proper developing of the print. rthe ruby lamp which is continually lighted allows the operator to properlyl adjust the negative and sensitized paper on the printing frame prior to the exposure, it being known that the rays of light emitted by such a lamp are .non-actinic. if desired, the printing iframe may be held in depressed position as above stated, in which event the white lamps are kept burning.

lt is understood that this machine is susceptible ot alteration in its details ot construction and toria within the scope ot the appended claims without departing from the spirit of the invention, and it is not desired to limit'the invention to the particular form scribed.

What is" claimed is:

and construction' shown and de- 1. In a printing machine, a casing having' an opening in its top, a printing frame resiliently supported over the opening, a back for the printing frame hinged to the casing, a spring-pressed electric switch and a contact therefor, the switch b eing adapted to be 'brought' into contact with the said contact lwhen* the frame is depressed, an electricl `casing, a cross bar slidably'mounted between the sides of the casing, white electric lamps carried by the said bar adapted to be lighted uponthe back being swung over the printing frame, a ruby lamp carried by the saidebar and adapted to be continuously lightedduring the use of the ma- Y chine, and means for sliding the said bar to and from the front of the casing.

3. In a printingmachine, a casin' having an opening 1n the top thereof an the 4 having [I ront wall thereof inclined, a printing frame arranged over the said opening,a backfor the printing frame hinged to the' casing, cleats Secured to the sides ofthe casing, a cross bar mounted thereon, white electric lamps carried by the said bar adapt# ed to be lighted upon the back being swung over the printing frame, a ruby lamp carried bythe said bar and adapted tobe continuously lighted during the use of the machine, and rods secured to the ends of the .bar and passing through the front of the casing for sliding the bar on the cleats.

4. In'a printing machine, a casingxhaving an opening in its top, a 'frame arranged around the opening and spaced from the edge of the opening to form a seat within the frame, a printing frame within the said frame, a pluralityv of springsdisposed be,

tween the said printing frame and the 'top of the casing, a back for thepri-nting frame hinged to the casing, a lamp. within the casing, conductors attached lto the said lam'p, and means -for closing the circuit through,V the said conductors upon the printing frame being depressed.

In testimony that I claimthe foregoing i as my own, I have hereto atlixed my signature in the presence of two witnesses.

, CHESTERA. BLDGrE'IT.l

Witnesses: f

E. F. ARMSTRONG,

G. F. JEFFRIES. 

